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d427b66a | 1 | /* Things for GLYPHS and glyph tables. |
429ab54e | 2 | Copyright (C) 1993, 2001, 2002, 2003, 2004, 2005, |
8cabe764 | 3 | 2006, 2007, 2008 Free Software Foundation, Inc. |
d427b66a JB |
4 | |
5 | This file is part of GNU Emacs. | |
6 | ||
b9b1cc14 | 7 | GNU Emacs is free software: you can redistribute it and/or modify |
d427b66a | 8 | it under the terms of the GNU General Public License as published by |
b9b1cc14 GM |
9 | the Free Software Foundation, either version 3 of the License, or |
10 | (at your option) any later version. | |
d427b66a JB |
11 | |
12 | GNU Emacs is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
b9b1cc14 | 18 | along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */ |
d427b66a JB |
19 | |
20 | /* Access the slots of a display-table, according to their purpose. */ | |
21 | ||
80af4e50 RS |
22 | #define DISP_TABLE_P(obj) \ |
23 | (CHAR_TABLE_P (obj) \ | |
10ffbb91 | 24 | && EQ (XCHAR_TABLE (obj)->purpose, Qdisplay_table) \ |
80af4e50 RS |
25 | && CHAR_TABLE_EXTRA_SLOTS (XCHAR_TABLE (obj)) == DISP_TABLE_EXTRA_SLOTS) |
26 | ||
27 | #define DISP_TABLE_EXTRA_SLOTS 6 | |
28 | #define DISP_TRUNC_GLYPH(dp) ((dp)->extras[0]) | |
29 | #define DISP_CONTINUE_GLYPH(dp) ((dp)->extras[1]) | |
30 | #define DISP_ESCAPE_GLYPH(dp) ((dp)->extras[2]) | |
31 | #define DISP_CTRL_GLYPH(dp) ((dp)->extras[3]) | |
32 | #define DISP_INVIS_VECTOR(dp) ((dp)->extras[4]) | |
33 | #define DISP_BORDER_GLYPH(dp) ((dp)->extras[5]) | |
34 | ||
9b854db0 | 35 | extern Lisp_Object disp_char_vector P_ ((struct Lisp_Char_Table *, int)); |
1e05cf1d | 36 | |
f35dca99 KH |
37 | #define DISP_CHAR_VECTOR(dp, c) \ |
38 | (ASCII_CHAR_P(c) \ | |
39 | ? (NILP ((dp)->ascii) \ | |
40 | ? (dp)->defalt \ | |
41 | : (SUB_CHAR_TABLE_P ((dp)->ascii) \ | |
42 | ? XSUB_CHAR_TABLE ((dp)->ascii)->contents[c] \ | |
43 | : (dp)->ascii)) \ | |
44 | : disp_char_vector ((dp), (c))) | |
d427b66a | 45 | |
ef5623ef | 46 | /* Defined in window.c. */ |
9b854db0 | 47 | extern struct Lisp_Char_Table *window_display_table P_ ((struct window *)); |
ef5623ef JB |
48 | |
49 | /* Defined in indent.c. */ | |
9b854db0 | 50 | extern struct Lisp_Char_Table *buffer_display_table P_ ((void)); |
d427b66a JB |
51 | |
52 | /* Display table to use for vectors that don't specify their own. */ | |
53 | extern Lisp_Object Vstandard_display_table; | |
54 | ||
80af4e50 RS |
55 | /* This is the `purpose' slot of a display table. */ |
56 | extern Lisp_Object Qdisplay_table; | |
57 | ||
d427b66a JB |
58 | /* Vector of GLYPH definitions. Indexed by GLYPH number, |
59 | the contents are a string which is how to output the GLYPH. */ | |
60 | extern Lisp_Object Vglyph_table; | |
61 | ||
62 | /* Return the current length of the GLYPH table, | |
63 | or 0 if the table isn't currently valid. */ | |
64 | #define GLYPH_TABLE_LENGTH \ | |
40de0d7b | 65 | ((VECTORP (Vglyph_table)) ? XVECTOR (Vglyph_table)->size : 0) |
d427b66a JB |
66 | |
67 | /* Return the current base (for indexing) of the GLYPH table, | |
68 | or 0 if the table isn't currently valid. */ | |
69 | #define GLYPH_TABLE_BASE \ | |
40de0d7b | 70 | ((VECTORP (Vglyph_table)) ? XVECTOR (Vglyph_table)->contents : 0) |
d427b66a JB |
71 | |
72 | /* Given BASE and LEN returned by the two previous macros, | |
73 | return nonzero if the GLYPH code G should be output as a single | |
74 | character with code G. Return zero if G has a string in the table. */ | |
ea92fc1a KS |
75 | #define GLYPH_SIMPLE_P(base,len,g) \ |
76 | (GLYPH_FACE (g) != DEFAULT_FACE_ID || GLYPH_CHAR (g) >= (len) || !STRINGP (base[GLYPH_CHAR (g)])) | |
d427b66a JB |
77 | |
78 | /* Given BASE and LEN returned by the two previous macros, | |
79 | return nonzero if GLYPH code G is aliased to a different code. */ | |
ea92fc1a KS |
80 | #define GLYPH_ALIAS_P(base,len,g) \ |
81 | (GLYPH_FACE (g) == DEFAULT_FACE_ID && GLYPH_CHAR (g) < (len) && INTEGERP (base[GLYPH_CHAR (g)])) | |
d427b66a | 82 | |
be269961 JB |
83 | /* Follow all aliases for G in the glyph table given by (BASE, |
84 | LENGTH), and set G to the final glyph. */ | |
ea92fc1a KS |
85 | #define GLYPH_FOLLOW_ALIASES(base, length, g) \ |
86 | do { \ | |
87 | while (GLYPH_ALIAS_P ((base), (length), (g))) \ | |
88 | SET_GLYPH_CHAR ((g), XINT ((base)[GLYPH_CHAR (g)])); \ | |
89 | if (!GLYPH_CHAR_VALID_P (g)) \ | |
90 | SET_GLYPH_CHAR (g, ' '); \ | |
cd49fad3 KH |
91 | } while (0) |
92 | ||
d427b66a JB |
93 | /* Assuming that GLYPH_SIMPLE_P (BASE, LEN, G) is 0, |
94 | return the length and the address of the character-sequence | |
95 | used for outputting GLYPH G. */ | |
ea92fc1a KS |
96 | #define GLYPH_LENGTH(base,g) SCHARS (base[GLYPH_CHAR (g)]) |
97 | #define GLYPH_STRING(base,g) SDATA (base[GLYPH_CHAR (g)]) | |
d427b66a JB |
98 | |
99 | /* GLYPH for a space character. */ | |
100 | ||
101 | #define SPACEGLYPH 040 | |
102 | #define NULL_GLYPH 00 | |
103 | ||
ea92fc1a KS |
104 | #define SET_GLYPH_FROM_CHAR(glyph, c) \ |
105 | SET_GLYPH (glyph, c, DEFAULT_FACE_ID) | |
6b61353c KH |
106 | |
107 | /* arch-tag: d7f792d2-f59c-4904-a91e-91522e3ab349 | |
108 | (do not change this comment) */ |